Wadyanoy
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Garuna didn't impress me :( her ability only starts working after you kill a stack of enemies, and I spend 3-4 turns just killing their horses, after which the remaining army fragments are no longer a threat.
There's no Mentor on the Dragon path, and people wrote that Fury of the Elements is an unnecessary ability.
It seems that under these conditions, you can only play as Necromancers with 2+ castles... Then time won't be a factor, and they can just keep producing their horses....